netdev - Re: [BUG] oops in net_rx_action on 64-bit powerpc

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Message-Id: <20081023.171614.72881694.davem@davemloft.net>
Date:	Thu, 23 Oct 2008 17:16:14 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jesse.brandeburg@...el.com
Cc:	cfriesen@...tel.com, linuxppc-dev@...abs.org,
	netdev@...r.kernel.org
Subject: Re: [BUG] oops in net_rx_action on 64-bit powerpc

From: "Brandeburg, Jesse" <jesse.brandeburg@...el.com>
Date: Thu, 23 Oct 2008 14:50:06 -0700

> Chris Friesen wrote:
> > I tried booting a post 2.6.27 -git on a Motorola ATCA6101 (very
> > similar to a Maple board).  The first time I booted I got the first
> > log below via the serial console.  I rebooted and got as far as a
> > login prompt.  I was able to log in via the serial console, but then
> > got an almost identical oops again, as shown in the second log below.
> > 
> > I configed out the gigE drivers for the backplane so the only
> > remaining network link was the e100 link used for booting, but the
> > problem remained. 
> > 
> > Anyone have any idea what might be causing this?
> > 
> > Thanks,
> > 
> > Chris
> > 
> > 
> > Starting xinetd: [  OK  ]
> > Starting cron: [  OK  ]
> > Unable to handle kernel paging request for data at address 0x00100108
> 
> that 00100108 pattern looks familiar, I'm not much help here, but I think that had something to do with the list management of the poll_list in a netdev struct.
> 
> so now you just have to figure out why someone's netdev struct is becoming NULL. :-)

Usually this is an indication of returning the wrong value from
the driver's ->poll() routine.

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